Development of allowable bearing capacity for strip foundations in unsaturated soils

摘要

An allowable bearing capacity formulation of strip foundations is developed for unsaturated soils under the non-hydrostatic in-situ stress. Four cases are analyzed according to both in-situ stress states and suction distributions. The proposed closed-form formulation is easy to use along with non-negative factors as an application condition. Furthermore, the obtained results are compared against three published results reported in the literature, and good agreements between these results are observed. Finally, a parametric study is performed to present how unsaturated strength characteristics and in-situ stress states affect the allowable bearing capacity.